Using SHOW SLAVE STATUS FOR CHANNEL
channel. By default, if
the FOR CHANNEL
channel clause is not
used, this statement shows the slave status for all channels
with one row per channel. The identifier
Channel_name is added as a column in the
result set. If a FOR CHANNEL
channel clause is
provided, the results show the status of only the named
replication channel.

Note

The SHOW VARIABLES statement does
not work with multiple replication channels. The information
that was available through these variables has been migrated to
the replication performance tables. Using a
SHOW VARIABLES statement in a
topology with multiple channels shows the status of only the
default channel.

17.1.4.3.1 Monitoring Channels Using Performance Schema Tables

This section explains how to use the replication Performance
Schema tables to monitor channels. You can choose to monitor all
channels, or a subset of the existing channels.

In the above output there are two channels enabled, and as shown
by the CHANNEL_NAME field they are called
master1 and master2.

The addition of the CHANNEL_NAME field
enables you to query the Performance Schema tables for a
specific channel. To monitor the connection status of a named
channel, use a WHERE
CHANNEL_NAME=channel
clause: